Lubricant Transfer in Disk Drives

Kasai, Paul H.; Raman, V.

doi:10.1007/s11249-012-0031-8

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…These ion fragments are with same structures as stated in our previous paper,11 while groups A and B come from original Z‐DOL lubricant and the presence of the ion group D indicates the C‐O‐C bond related decomposition of the Z‐DOL lubricant 12–14. Therefore, the laser irradiation induces the decomposition of the Z‐DOL lubricated film.…”

Section: Resultssupporting

confidence: 70%

TOF‐SIMS analysis of media lubricant under laser irradiation for HAMR application

Liew

et al. 2011

Surface & Interface Analysis

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Heat-assistant magnetic recording (HAMR) is a promising approach for enabling large increases in storage density of a hard disk drive. Under HAMR conditions, all hard disk components including lubricant thin film used for hard disk media should have the property of high thermal stability. This paper studies the property of a potential and current commercial lubricant under HAMR laser irradiation conditions. Through the study of the relationship between the lubricant molecular structure and the properties, guidance for new lubricant design and development has been explored.

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Section: Resultssupporting

confidence: 70%

TOF‐SIMS analysis of media lubricant under laser irradiation for HAMR application

Liew

et al. 2011

Surface & Interface Analysis

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“…Moreover, the lubricant thickness is so small that the relationship between viscosity and thickness cannot be ignored. The viscosity of fluid film is expressed as [10]…”

Section: Deformation Of Lubricant Film Under the Heat Sourcementioning

confidence: 99%

“…[8] The surface tension relating to temperature and film thickness, as well as the factors influencing the lubricant transfer, such as the sedimentary processes of hydrone, the hydrosoluble electrolyte and alkali halide, was considered in the calculation of lubricant film thickness deformation. [9,10] The effect of shear extrusion on rarefied gas lubrication performance influence was investigated under the mode of roughness. [11] It can be seen from these studies that the lubricant flow is a complex problem, and it is difficult to obtain an overall method or expressions to describe its flow characteristics.…”

Section: Introductionmentioning

confidence: 99%

Lubricant film flow and depletion characteristics at head/disk storage interface

Han

Zhang

et al. 2016

Chinese Phys. B

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The characteristics of lubricant film at head/disk interface (HDI) are essential to the stability of hard disk drives. In this study, the theoretical models of the lubricant flow and depletion are deduced based on Navier-Stokes (NS) and continuity equations. The air bearing pressure on the surface of the lubrication film is solved by the modified Reynolds equation based on Fukui and Kaneko (FK) model. Then the lubricant film deformations for a plane slider and double-track slider are obtained. The equation of lubricant film thickness is deduced with the consideration of van der Waals force, the air bearing pressure, the surface tension, and the external stresses. The lubricant depletion under heat source is simulated and the effects of different working conditions including initial thickness, flying height and the speed of the disk on lubricant depletion are discussed. The main factors that cause the lubricant flow and depletion are analyzed and the ways to reduce the film thickness deformation are proposed. The simulation results indicate that the shearing stress is the most important factor that causes the thickness deformation and other terms listed in the equation have little influence. The thickness deformation is dependent on the working parameter, and the thermal condition evaporation is the most important factor.

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Analysis of thermal flying-height control slider in a hard disk drive under humid air condition

Choi

Park

et al. 2015

Microsyst Technol

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Lubricant Transfer in Disk Drives

Cited by 9 publications

References 8 publications

TOF‐SIMS analysis of media lubricant under laser irradiation for HAMR application

TOF‐SIMS analysis of media lubricant under laser irradiation for HAMR application

Lubricant film flow and depletion characteristics at head/disk storage interface

Analysis of thermal flying-height control slider in a hard disk drive under humid air condition

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